AFAIK, there isn't a service schedule for the filter on petrol models. Same with the gearbox oil (manual) and (I think) the coolant. 'Sealed for life'. Yeah, sealed for the duration of the warranty more like.
I replace mine annually. As said already, fuel is pretty dirty.
This is why enthusiast owned cars are the best cars to buy, because they ignore VW and replace said stuff anyway. A 10+ year old full dealer history GTI will have 10 year old gear oil, 10 year old coolant and a 10 year old fuel filter